Assigwob of one-half to obbiit v



e. WlHERSHEY.

- STARIING CRANK LOCK.

- APPLICATION HLED JAN. 13. I919. 1,313,485.

Patented Aug. 19, 1919.

2 SHEETS-SHEET I.

Tun COLUMBIA PLANO 1:0,, WASHINd'ION, D. C.

G W. HERSHEY. STARTING CRANK LOCK, APPLICATION FILED IAN. 13. 1919.

Patented A11g. 19,1919.

2 SHEE'S-SHEET 2 aka h m 01. WASHINGTO UNITED STATES PATENT oFF oE.

GRANT W. HERSHEY, OF FREMONT OHIO, ASSIGN'OR OF ONE-HALF TO ORRI N V.

' BUBKETT, 0F FREMONT, OHIO.

STARTING-CRANK LOCK.

Specification bf Letters Patent.

Patented Aug. 19, 1919.

Application filed January 13, 1919. Serial No. 270,923.

To all whom it may concern:

Be it known that I, GRANT W. HERSHEY, a citizen of the United States, residing at Fremont, in the county of 'Sandusky and State of Ohio, have invented certain new and useful Improvements in Starting-Crank Locks; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention has for its object to provide a simple and inexpensive yet highly eflicient and reliable device to prevent automobile and other motors from back-firing and injuring the person cranking the same. With this object in view, the invention resides in certain novel features of construction and unique arrangements of parts hereinafter fully described and claimed, reference being made to the accompanying drawings.

Figure 1 is a top plan view of the invention applied.

Fig. 2 is a front end elevation.

Fig. 3 is a side elevation.

Fig. 4 is a horizontal section as indicated by the line 4-4 of Fig. 2.

Fig. 5 is a vertical transverse section on the plane of the line 5-5 of Fig. 4.

Fig. 6 is a vertical longitudinal section as indicated by the line 66 of Fig. 2.

In the drawings above briefly described, the numeral 1 designates a substantially cylindrical casing preferably formed of cast metal and provided with laterally extending angular arms 2 and a depending lug 3, said arms being adapted for bolting to the frame 4 of an automobile, while the lug 3 is designed to abut the front bar of the frame as shown. A ring 5 fits snugly in the casing 1 between the ends of the latter and is secured therein against rotation and against shifting longitudinally of the casing, byscrews 6, the inner side of said ring being provided with a wedge shaped recess 7 in which a roller 8 is received. Front and rear end plates 9 and 10 are provided for the casing 1, said rear end plate being secured to the casing by screws or the like 11 while the plate 9 fits into the casing, is spaced from the ring 6 by sleeves 12, and is secured to said ring by screws 13 passing through the sleeves. A space exists between the ring 5 and both of the end plates, and coil springs 14 are located in these spaces, one end of said springs being anchored at 15 to the ring 5 while the other ends of said springs are hooked over headed studs 16 on the ends of the roller 8. The springs thus exert their tension to retain the roller at the narrow end of the recess 7.

end plates 9 and 10, to engage the roller 8.

When the shaft is turned in the direction to crank the motor the roller has a tendency to move to the wide end of the recess 7 and thus interferes in no manner with the cranking operation. When however, the motor back-fires, the roller, in moving to the narrow end of the recess 7 tightly'locks the shaft and crank against retrograde rotation, thus preventing injury to the person cranking the machine.

The device is of simple and inexpensive nature, yet will be highly efiicient, reliable and in every way desirable. Since excellent results are obtained from the details disclosed they are preferably followed, but within the scope of the invention as claimed considerable latitude is allowed for making such minor changes as occasion may dictate.

I claim In combination with an automobile cranking shaft, a substantially cylindrical casing through which said shaft passes coaxially, a ring fitting into said casing between the ends of the latter, said shaft passing through said ring and the latter having a wedge shaped recess in its shaft engaging side, screws passing through said casing into said ring to anchor the latter against rotation and sliding endwise of the casing, end

plates closing the ends of said casing and and ring for drawing said roller to the narspaced from said ring, a roller in said recess row end of said recess and means connecting for engagement with the shaft to look the said springs to said ring. 10 latter against retrograde movement, headed In testimony whereof I have hereunto set studs on the ends of said roller, a-pair of my hand.

coil springs hooked over said studs and 10- cated inthe spaces between said endplates GRANT W. HERSHEY.

copiel of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, DBO." 

